Merge branch 'feature/slack-notifications-on-ci' into 'master'

update ci configuration to send slack notifications on failure

Updates CI config file and adds a task to send notifications when a build fails on master or on any tag.

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/12805

See merge request !2681

.gitlab-ci.yml

@@ -24,7 +24,12 @@ before_script:
   - bundle install --without postgres production --jobs $(nproc)  "${FLAGS[@]}"
   - RAILS_ENV=test bundle exec rake db:drop db:create db:schema:load db:migrate
 
+stages:
+- test
+- notifications
+
 spec:feature:
+  stage: test
   script:
     - RAILS_ENV=test bundle exec rake assets:precompile 2>/dev/null
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spec:feature
@@ -33,6 +38,7 @@ spec:feature:
     - mysql
 
 spec:api:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spec:api
   tags:
@@ -40,6 +46,7 @@ spec:api:
     - mysql
 
 spec:models:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spec:models
   tags:
@@ -47,6 +54,7 @@ spec:models:
     - mysql
 
 spec:lib:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spec:lib
   tags:
@@ -54,6 +62,7 @@ spec:lib:
     - mysql
 
 spec:services:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spec:services
   tags:
@@ -61,6 +70,7 @@ spec:services:
     - mysql
 
 spec:benchmark:
+  stage: test
   script:
     - RAILS_ENV=test bundle exec rake spec:benchmark
   tags:
@@ -69,6 +79,7 @@ spec:benchmark:
   allow_failure: true
 
 spec:other:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spec:other
   tags:
@@ -76,6 +87,7 @@ spec:other:
     - mysql
 
 spinach:project:half:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spinach:project:half
   tags:
@@ -83,6 +95,7 @@ spinach:project:half:
     - mysql
 
 spinach:project:rest:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spinach:project:rest
   tags:
@@ -90,6 +103,7 @@ spinach:project:rest:
     - mysql
 
 spinach:other:
+  stage: test
   script:
     - RAILS_ENV=test SIMPLECOV=true bundle exec rake spinach:other
   tags:
@@ -97,6 +111,7 @@ spinach:other:
     - mysql
 
 teaspoon:
+  stage: test
   script:
     - RAILS_ENV=test bundle exec teaspoon
   tags:
@@ -104,6 +119,7 @@ teaspoon:
     - mysql
 
 rubocop:
+  stage: test
   script:
     - bundle exec rubocop
   tags:
@@ -111,6 +127,7 @@ rubocop:
     - mysql
 
 brakeman:
+  stage: test
   script:
     - bundle exec rake brakeman
   tags:
@@ -118,6 +135,7 @@ brakeman:
     - mysql
 
 flog:
+  stage: test
   script:
     - bundle exec rake flog
   tags:
@@ -125,6 +143,7 @@ flog:
     - mysql
 
 flay:
+  stage: test
   script:
     - bundle exec rake flay
   tags:
@@ -132,6 +151,7 @@ flay:
     - mysql
 
 bundler:audit:
+  stage: test
   script:
     - "bundle exec bundle-audit update"
     - "bundle exec bundle-audit check"
@@ -143,6 +163,7 @@ bundler:audit:
 # Ruby 2.2 jobs
 
 spec:feature:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -158,6 +179,7 @@ spec:feature:ruby22:
     - mysql
 
 spec:api:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -172,6 +194,7 @@ spec:api:ruby22:
     - mysql
 
 spec:models:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -186,6 +209,7 @@ spec:models:ruby22:
     - mysql
 
 spec:lib:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -200,6 +224,7 @@ spec:lib:ruby22:
     - mysql
 
 spec:services:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -214,6 +239,7 @@ spec:services:ruby22:
     - mysql
 
 spec:benchmark:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -229,6 +255,7 @@ spec:benchmark:ruby22:
   allow_failure: true
 
 spec:other:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -243,6 +270,7 @@ spec:other:ruby22:
     - mysql
 
 spinach:project:half:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -257,6 +285,7 @@ spinach:project:half:ruby22:
     - mysql
 
 spinach:project:rest:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -271,6 +300,7 @@ spinach:project:rest:ruby22:
     - mysql
 
 spinach:other:ruby22:
+  stage: test
   image: ruby:2.2
   only:
   - master
@@ -284,3 +314,14 @@ spinach:other:ruby22:
     - ruby
     - mysql
 
+
+notify:slack:
+  stage: notifications
+  script:
+    - ./scripts/notify_slack.sh "#builds" "Build failed for master/tags!"
+  when: on_failure
+  only:
+    - master@gitlab-org/gitlab-ce
+    - tags@gitlab-org/gitlab-ce
+    - master@gitlab-org/gitlab-ee
+    - tags@gitlab-org/gitlab-ee
\ No newline at end of file

scripts/notify_slack.sh

+#!/bin/bash
+# Sends Slack notification ERROR_MSG to CHANNEL
+# An env. variable CI_SLACK_WEBHOOK_URL needs to be set.
+
+CHANNEL=$1
+ERROR_MSG=$2
+
+if [ -z "$CHANNEL" ] || [ -z "$ERROR_MSG" ] || [ -z "$CI_SLACK_WEBHOOK_URL" ]; then
+    echo "Missing argument(s) - Use: $0 channel message"
+    echo "and set CI_SLACK_WEBHOOK_URL environment variable."
+else
+    curl -X POST --data-urlencode 'payload={"channel": "'"$CHANNEL"'", "username": "gitlab-ci", "text": "'"$ERROR_MSG"'", "icon_emoji": ":gitlab:"}' "$CI_SLACK_WEBHOOK_URL"
+fi
\ No newline at end of file